"He should have had no business in that hospital in the first place, he should have no business walking the streets," Smith said.

"I would have died for her if I could. She knows it, everybody knows it," Rouzer's husband, Scott Rouzer, said.

Scott Rouzer said his wife was dedicated to her work at Parish Medical and the people she helped there. She worked as a sitter, visiting and comforting patients, for 13 years.

"That was her job at the hospital was to sit with them and make sure they were OK and take care of them," Smith said. "People’s family members would send letters to my mom thanking her saying, 'Thank you for helping my family.'"

Smith said many of his friends knew her as "mom" too, and now as he and the rest of her loved ones cope with unimaginable sudden loss, Smith tells WESH he'll make sure her spirit lives on.

He said his mom has always been his biggest motivator.

"She won’t ever die as far as I'm concerned," Smith said.

Police said David Owens, 29, entered Parrish Medical Center at 2 a.m. They said he went to the third-floor room of Zingsheim and fatally shot her and Rouzer with a handgun.

Owens was quickly tackled by two unarmed hospital security guards and arrested. He has been charged with two counts of murder.